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            <tr><td class="title">LCOV - code coverage report</td></tr>
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            <td width="10%" class="headerItem">Current view:</td>
            <td width="10%" class="headerValue"><a href="../index.html" title="Click to go to top-level">top level</a> - <a href="index.html" title="Click to go to directory Buffer">Buffer</a> - buffer.cpp<span style="font-size: 80%;"> (source / <a href="buffer.cpp.func-c.html" title="Click to go to function table">functions</a>)</span></td>
            <td width="5%"></td>
            <td width="5%"></td>
            <td width="5%" class="headerCovTableHead">Coverage</td>
            <td width="5%" class="headerCovTableHead" title="Covered + Uncovered code">Total</td>
            <td width="5%" class="headerCovTableHead" title="Exercised code only">Hit</td>
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            <td class="headerItem">Test:</td>
            <td class="headerValue">覆盖率信息</td>
            <td></td>
            <td class="headerItem">Lines:</td>
            <td class="headerCovTableEntryLo">38.6&nbsp;%</td>
            <td class="headerCovTableEntry">88</td>
            <td class="headerCovTableEntry">34</td>
          </tr>
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            <td class="headerItem">Test Date:</td>
            <td class="headerValue">2024-03-12 16:43:50</td>
            <td></td>
            <td class="headerItem">Functions:</td>
            <td class="headerCovTableEntryLo">54.5&nbsp;%</td>
            <td class="headerCovTableEntry">22</td>
            <td class="headerCovTableEntry">12</td>
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            <td class="headerItem">Legend:</td>
            <td class="headerValueLeg">            Lines:
            <span class="coverLegendCov">hit</span>
            <span class="coverLegendNoCov">not hit</span>
            | Branches:
            <span class="coverLegendCov">+</span> taken
            <span class="coverLegendNoCov">-</span> not taken
            <span class="coverLegendNoCov">#</span> not executed
</td>
            <td></td>
            <td class="headerItem">Branches:</td>
            <td class="headerCovTableEntryLo">18.8&nbsp;%</td>
            <td class="headerCovTableEntry">32</td>
            <td class="headerCovTableEntry">6</td>
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<pre class="sourceHeading">             Branch data     Line data    Source code</pre>
<pre class="source">
<span id="L1"><span class="lineNum">       1</span>                 :             : #include &quot;buffer.h&quot;</span>
<span id="L2"><span class="lineNum">       2</span>                 :             : </span>
<span id="L3"><span class="lineNum">       3</span>         [<span class="tlaGBC" title="Branch 0 was taken 1 time"> + </span><span class="tlaUNC" title="Branch 1 was not taken"> - </span>]:<span class="tlaGNC tlaBgGNC">           3 : Buffer::Buffer(int initBuffSize) : buffer_(initBuffSize), readPos_(0), writePos_(0) {}</span></span>
<span id="L4"><span class="lineNum">       4</span>                 :             : </span>
<span id="L5"><span class="lineNum">       5</span>                 :             : // 可读的数量</span>
<span id="L6"><span class="lineNum">       6</span>                 :<span class="tlaGNC">           1 : size_t Buffer::ReadableBytes() const {</span></span>
<span id="L7"><span class="lineNum">       7</span>                 :<span class="tlaGNC">           1 :     return writePos_ - readPos_; </span></span>
<span id="L8"><span class="lineNum">       8</span>                 :             : }</span>
<span id="L9"><span class="lineNum">       9</span>                 :             : </span>
<span id="L10"><span class="lineNum">      10</span>                 :             : // 可写的数量</span>
<span id="L11"><span class="lineNum">      11</span>                 :<span class="tlaGNC">           5 : size_t Buffer::WritebleBytes() const {</span></span>
<span id="L12"><span class="lineNum">      12</span>                 :<span class="tlaGNC">           5 :     return buffer_.size() - writePos_;</span></span>
<span id="L13"><span class="lineNum">      13</span>                 :             : }</span>
<span id="L14"><span class="lineNum">      14</span>                 :             : </span>
<span id="L15"><span class="lineNum">      15</span>                 :             : // 可预留空间</span>
<span id="L16"><span class="lineNum">      16</span>                 :<span class="tlaUNC tlaBgUNC">           0 : size_t Buffer::PrependableBytes() const {</span></span>
<span id="L17"><span class="lineNum">      17</span>                 :<span class="tlaUNC">           0 :     return readPos_;</span></span>
<span id="L18"><span class="lineNum">      18</span>                 :             : }</span>
<span id="L19"><span class="lineNum">      19</span>                 :             : </span>
<span id="L20"><span class="lineNum">      20</span>                 :             : // 返回当前读点的指针</span>
<span id="L21"><span class="lineNum">      21</span>                 :<span class="tlaGNC tlaBgGNC">           1 : const char* Buffer::Peek() const {</span></span>
<span id="L22"><span class="lineNum">      22</span>                 :<span class="tlaGNC">           1 :     return BeginPtr_() + readPos_;</span></span>
<span id="L23"><span class="lineNum">      23</span>                 :             : }</span>
<span id="L24"><span class="lineNum">      24</span>                 :             : </span>
<span id="L25"><span class="lineNum">      25</span>                 :             : // 读指针向后走len个单位</span>
<span id="L26"><span class="lineNum">      26</span>                 :<span class="tlaUNC tlaBgUNC">           0 : void Buffer::Retrive(size_t len) {</span></span>
<span id="L27"><span class="lineNum">      27</span>         [<span class="tlaUNC" title="Branch 0 was not executed"> # </span><span class="tlaUNC" title="Branch 1 was not executed"> # </span>]:<span class="tlaUNC">           0 :     assert(len &lt;= ReadableBytes());</span></span>
<span id="L28"><span class="lineNum">      28</span>                 :<span class="tlaUNC">           0 :     readPos_ += len;</span></span>
<span id="L29"><span class="lineNum">      29</span>                 :<span class="tlaUNC">           0 : }</span></span>
<span id="L30"><span class="lineNum">      30</span>                 :             : </span>
<span id="L31"><span class="lineNum">      31</span>                 :             : // 读取len长度的指针版本,读到end位置</span>
<span id="L32"><span class="lineNum">      32</span>                 :<span class="tlaUNC">           0 : void Buffer::RetriveUntil(const char* end) {</span></span>
<span id="L33"><span class="lineNum">      33</span>         [<span class="tlaUNC" title="Branch 0 was not executed"> # </span><span class="tlaUNC" title="Branch 1 was not executed"> # </span>]:<span class="tlaUNC">           0 :     assert(Peek() &lt;= end);</span></span>
<span id="L34"><span class="lineNum">      34</span>                 :<span class="tlaUNC">           0 :     Retrive(end - Peek());</span></span>
<span id="L35"><span class="lineNum">      35</span>                 :<span class="tlaUNC">           0 : }</span></span>
<span id="L36"><span class="lineNum">      36</span>                 :             : //将所有数据归零</span>
<span id="L37"><span class="lineNum">      37</span>                 :<span class="tlaGNC tlaBgGNC">           3 : void Buffer::RetriveAll()</span></span>
<span id="L38"><span class="lineNum">      38</span>                 :             : {</span>
<span id="L39"><span class="lineNum">      39</span>                 :<span class="tlaGNC">           3 :     bzero(&amp;buffer_[0], buffer_.size());</span></span>
<span id="L40"><span class="lineNum">      40</span>                 :<span class="tlaGNC">           3 :     readPos_ = writePos_ = 0;</span></span>
<span id="L41"><span class="lineNum">      41</span>                 :<span class="tlaGNC">           3 : }</span></span>
<span id="L42"><span class="lineNum">      42</span>                 :             : </span>
<span id="L43"><span class="lineNum">      43</span>                 :             : // 去除剩余可读的string</span>
<span id="L44"><span class="lineNum">      44</span>                 :<span class="tlaGNC">           1 : std::string Buffer::RetriveAllToStr() {</span></span>
<span id="L45"><span class="lineNum">      45</span>   [<span class="tlaGBC" title="Branch 0 was taken 1 time"> + </span><span class="tlaUNC" title="Branch 1 was not taken"> - </span><span class="tlaGBC" title="Branch 2 was taken 1 time"> + </span><span class="tlaUNC" title="Branch 3 was not taken"> - </span>]:<span class="tlaGNC">           1 :     std::string str(Peek(), ReadableBytes());</span></span>
<span id="L46"><span class="lineNum">      46</span>                 :<span class="tlaGNC">           1 :     RetriveAll();</span></span>
<span id="L47"><span class="lineNum">      47</span>                 :<span class="tlaGNC">           1 :     return str;</span></span>
<span id="L48"><span class="lineNum">      48</span>                 :             : }</span>
<span id="L49"><span class="lineNum">      49</span>                 :             : </span>
<span id="L50"><span class="lineNum">      50</span>                 :             : // 写指针的位置</span>
<span id="L51"><span class="lineNum">      51</span>                 :<span class="tlaUNC tlaBgUNC">           0 : const char* Buffer::BeginWriteConst() const {</span></span>
<span id="L52"><span class="lineNum">      52</span>                 :<span class="tlaUNC">           0 :     return BeginPtr_() + writePos_;</span></span>
<span id="L53"><span class="lineNum">      53</span>                 :             : }</span>
<span id="L54"><span class="lineNum">      54</span>                 :             : </span>
<span id="L55"><span class="lineNum">      55</span>                 :             : //</span>
<span id="L56"><span class="lineNum">      56</span>                 :<span class="tlaGNC tlaBgGNC">           4 : char* Buffer::BeginWrite() {</span></span>
<span id="L57"><span class="lineNum">      57</span>                 :<span class="tlaGNC">           4 :     return BeginPtr_() + writePos_;</span></span>
<span id="L58"><span class="lineNum">      58</span>                 :             : }</span>
<span id="L59"><span class="lineNum">      59</span>                 :             : </span>
<span id="L60"><span class="lineNum">      60</span>                 :             : // 移动写下标</span>
<span id="L61"><span class="lineNum">      61</span>                 :<span class="tlaGNC">           4 : void Buffer::HasWritten(size_t len) {</span></span>
<span id="L62"><span class="lineNum">      62</span>                 :<span class="tlaGNC">           4 :     writePos_ += len;</span></span>
<span id="L63"><span class="lineNum">      63</span>                 :<span class="tlaGNC">           4 : }</span></span>
<span id="L64"><span class="lineNum">      64</span>                 :             : </span>
<span id="L65"><span class="lineNum">      65</span>                 :             : //</span>
<span id="L66"><span class="lineNum">      66</span>                 :<span class="tlaUNC tlaBgUNC">           0 : void Buffer::Append(const std::string&amp; str) {</span></span>
<span id="L67"><span class="lineNum">      67</span>                 :<span class="tlaUNC">           0 :     Append(str.data(), str.length());</span></span>
<span id="L68"><span class="lineNum">      68</span>                 :<span class="tlaUNC">           0 : }</span></span>
<span id="L69"><span class="lineNum">      69</span>                 :             : </span>
<span id="L70"><span class="lineNum">      70</span>                 :<span class="tlaUNC">           0 : void Buffer::Append(const void* data, size_t len) {</span></span>
<span id="L71"><span class="lineNum">      71</span>         [<span class="tlaUNC" title="Branch 0 was not executed"> # </span><span class="tlaUNC" title="Branch 1 was not executed"> # </span>]:<span class="tlaUNC">           0 :     assert(data);</span></span>
<span id="L72"><span class="lineNum">      72</span>                 :<span class="tlaUNC">           0 :     Append(static_cast&lt;const char*&gt;(data), len);</span></span>
<span id="L73"><span class="lineNum">      73</span>                 :<span class="tlaUNC">           0 : }</span></span>
<span id="L74"><span class="lineNum">      74</span>                 :             : </span>
<span id="L75"><span class="lineNum">      75</span>                 :             : // 添加str到缓冲区</span>
<span id="L76"><span class="lineNum">      76</span>                 :<span class="tlaGNC tlaBgGNC">           2 : void Buffer::Append(const char* str, size_t len) {</span></span>
<span id="L77"><span class="lineNum">      77</span>         [<span class="tlaUNC" title="Branch 0 was not taken"> - </span><span class="tlaGBC" title="Branch 1 was taken 2 times"> + </span>]:<span class="tlaGNC">           2 :     assert(str);</span></span>
<span id="L78"><span class="lineNum">      78</span>                 :<span class="tlaGNC">           2 :     EnsureWriteable(len);</span></span>
<span id="L79"><span class="lineNum">      79</span>                 :<span class="tlaGNC">           2 :     std::copy(str, str + len, BeginWrite());</span></span>
<span id="L80"><span class="lineNum">      80</span>                 :<span class="tlaGNC">           2 :     HasWritten(len);</span></span>
<span id="L81"><span class="lineNum">      81</span>                 :<span class="tlaGNC">           2 : }</span></span>
<span id="L82"><span class="lineNum">      82</span>                 :             : </span>
<span id="L83"><span class="lineNum">      83</span>                 :             : // 将buff中没读完的数据添加到buffer中</span>
<span id="L84"><span class="lineNum">      84</span>                 :<span class="tlaUNC tlaBgUNC">           0 : void Buffer::Append(const Buffer&amp; buff) {</span></span>
<span id="L85"><span class="lineNum">      85</span>                 :<span class="tlaUNC">           0 :     Append(buff.Peek(), buff.ReadableBytes());</span></span>
<span id="L86"><span class="lineNum">      86</span>                 :<span class="tlaUNC">           0 : }</span></span>
<span id="L87"><span class="lineNum">      87</span>                 :             : </span>
<span id="L88"><span class="lineNum">      88</span>                 :             : // 确保可写的长度足够</span>
<span id="L89"><span class="lineNum">      89</span>                 :<span class="tlaGNC tlaBgGNC">           2 : void Buffer::EnsureWriteable(size_t len) {</span></span>
<span id="L90"><span class="lineNum">      90</span>         [<span class="tlaUNC" title="Branch 0 was not taken"> - </span><span class="tlaGBC" title="Branch 1 was taken 2 times"> + </span>]:<span class="tlaGNC">           2 :     if(WritebleBytes() &lt; len)</span></span>
<span id="L91"><span class="lineNum">      91</span>                 :             :     {</span>
<span id="L92"><span class="lineNum">      92</span>                 :<span class="tlaUNC tlaBgUNC">           0 :         MakeSpace_(len);</span></span>
<span id="L93"><span class="lineNum">      93</span>                 :             :     }</span>
<span id="L94"><span class="lineNum">      94</span>         [<span class="tlaUNC" title="Branch 0 was not taken"> - </span><span class="tlaGBC" title="Branch 1 was taken 2 times"> + </span>]:<span class="tlaGNC tlaBgGNC">           2 :     assert(WritebleBytes() &gt;= len);</span></span>
<span id="L95"><span class="lineNum">      95</span>                 :<span class="tlaGNC">           2 : }</span></span>
<span id="L96"><span class="lineNum">      96</span>                 :             : </span>
<span id="L97"><span class="lineNum">      97</span>                 :<span class="tlaUNC tlaBgUNC">           0 : ssize_t Buffer::ReadFd(int fd, int* saveErrno) {</span></span>
<span id="L98"><span class="lineNum">      98</span>                 :             :     char buff[65535];       // 临时的数组，保证能够把所有的数据都读出来</span>
<span id="L99"><span class="lineNum">      99</span>                 :             :     struct iovec iov[2];    // 原始数组</span>
<span id="L100"><span class="lineNum">     100</span>                 :<span class="tlaUNC">           0 :     const size_t writable = WritebleBytes();    // 记录下能写的空间</span></span>
<span id="L101"><span class="lineNum">     101</span>                 :             : </span>
<span id="L102"><span class="lineNum">     102</span>                 :             :     // 分散读，保证数据全部读完</span>
<span id="L103"><span class="lineNum">     103</span>                 :<span class="tlaUNC">           0 :     iov[0].iov_base = BeginPtr_() + writePos_;</span></span>
<span id="L104"><span class="lineNum">     104</span>                 :<span class="tlaUNC">           0 :     iov[0].iov_len = writable;</span></span>
<span id="L105"><span class="lineNum">     105</span>                 :<span class="tlaUNC">           0 :     iov[1].iov_base = buff;</span></span>
<span id="L106"><span class="lineNum">     106</span>                 :<span class="tlaUNC">           0 :     iov[1].iov_len = sizeof(buff);</span></span>
<span id="L107"><span class="lineNum">     107</span>                 :             : </span>
<span id="L108"><span class="lineNum">     108</span>         [<span class="tlaUNC" title="Branch 0 was not executed"> # </span><span class="tlaUNC" title="Branch 1 was not executed"> # </span>]:<span class="tlaUNC">           0 :     const ssize_t len = readv(fd, iov, 2);      // 减少系统调用次数</span></span>
<span id="L109"><span class="lineNum">     109</span>         [<span class="tlaUNC" title="Branch 0 was not executed"> # </span><span class="tlaUNC" title="Branch 1 was not executed"> # </span>]:<span class="tlaUNC">           0 :     if(len &lt; 0) {</span></span>
<span id="L110"><span class="lineNum">     110</span>                 :<span class="tlaUNC">           0 :         *saveErrno = errno;</span></span>
<span id="L111"><span class="lineNum">     111</span>         [<span class="tlaUNC" title="Branch 0 was not executed"> # </span><span class="tlaUNC" title="Branch 1 was not executed"> # </span>]:<span class="tlaUNC">           0 :     } else if(static_cast&lt;size_t&gt;(len) &lt;= writable) {</span></span>
<span id="L112"><span class="lineNum">     112</span>                 :<span class="tlaUNC">           0 :         writePos_ += len;</span></span>
<span id="L113"><span class="lineNum">     113</span>                 :             :     } else {</span>
<span id="L114"><span class="lineNum">     114</span>                 :<span class="tlaUNC">           0 :         writePos_ = buffer_.size();</span></span>
<span id="L115"><span class="lineNum">     115</span>         [<span class="tlaUNC" title="Branch 0 was not executed"> # </span><span class="tlaUNC" title="Branch 1 was not executed"> # </span>]:<span class="tlaUNC">           0 :         Append(buff, len - writable);</span></span>
<span id="L116"><span class="lineNum">     116</span>                 :             :     }</span>
<span id="L117"><span class="lineNum">     117</span>                 :<span class="tlaUNC">           0 :     return len;</span></span>
<span id="L118"><span class="lineNum">     118</span>                 :             : }</span>
<span id="L119"><span class="lineNum">     119</span>                 :             : </span>
<span id="L120"><span class="lineNum">     120</span>                 :<span class="tlaUNC">           0 : ssize_t Buffer::WriteFd(int fd, int* saveErrno) {</span></span>
<span id="L121"><span class="lineNum">     121</span>                 :<span class="tlaUNC">           0 :     size_t readSize = ReadableBytes();</span></span>
<span id="L122"><span class="lineNum">     122</span>                 :<span class="tlaUNC">           0 :     ssize_t len = write(fd, Peek(), readSize);</span></span>
<span id="L123"><span class="lineNum">     123</span>         [<span class="tlaUNC" title="Branch 0 was not executed"> # </span><span class="tlaUNC" title="Branch 1 was not executed"> # </span>]:<span class="tlaUNC">           0 :     if(len &lt; 0) {</span></span>
<span id="L124"><span class="lineNum">     124</span>                 :<span class="tlaUNC">           0 :         *saveErrno = errno;</span></span>
<span id="L125"><span class="lineNum">     125</span>                 :<span class="tlaUNC">           0 :         return len;</span></span>
<span id="L126"><span class="lineNum">     126</span>                 :             :     }</span>
<span id="L127"><span class="lineNum">     127</span>                 :<span class="tlaUNC">           0 :     readPos_ += len;</span></span>
<span id="L128"><span class="lineNum">     128</span>                 :<span class="tlaUNC">           0 :     return len;</span></span>
<span id="L129"><span class="lineNum">     129</span>                 :             : }</span>
<span id="L130"><span class="lineNum">     130</span>                 :             : </span>
<span id="L131"><span class="lineNum">     131</span>                 :<span class="tlaGNC tlaBgGNC">           4 : char* Buffer::BeginPtr_() {</span></span>
<span id="L132"><span class="lineNum">     132</span>                 :<span class="tlaGNC">           4 :     return &amp;*buffer_.begin();</span></span>
<span id="L133"><span class="lineNum">     133</span>                 :             : }</span>
<span id="L134"><span class="lineNum">     134</span>                 :             : </span>
<span id="L135"><span class="lineNum">     135</span>                 :<span class="tlaGNC">           1 : const char* Buffer::BeginPtr_() const {</span></span>
<span id="L136"><span class="lineNum">     136</span>                 :<span class="tlaGNC">           1 :     return &amp;*buffer_.begin();</span></span>
<span id="L137"><span class="lineNum">     137</span>                 :             : }</span>
<span id="L138"><span class="lineNum">     138</span>                 :             : </span>
<span id="L139"><span class="lineNum">     139</span>                 :             : // 对buffer进行扩张</span>
<span id="L140"><span class="lineNum">     140</span>                 :<span class="tlaUNC tlaBgUNC">           0 : void Buffer::MakeSpace_(size_t len) {</span></span>
<span id="L141"><span class="lineNum">     141</span>         [<span class="tlaUNC" title="Branch 0 was not executed"> # </span><span class="tlaUNC" title="Branch 1 was not executed"> # </span>]:<span class="tlaUNC">           0 :     if(WritebleBytes() + PrependableBytes() &lt; len) {</span></span>
<span id="L142"><span class="lineNum">     142</span>                 :<span class="tlaUNC">           0 :         buffer_.resize(writePos_ + len + 1);</span></span>
<span id="L143"><span class="lineNum">     143</span>                 :             :     } else {</span>
<span id="L144"><span class="lineNum">     144</span>                 :<span class="tlaUNC">           0 :         size_t readable = ReadableBytes();</span></span>
<span id="L145"><span class="lineNum">     145</span>                 :<span class="tlaUNC">           0 :         std::copy(BeginPtr_() + readPos_, BeginPtr_() + writePos_, BeginPtr_());</span></span>
<span id="L146"><span class="lineNum">     146</span>                 :<span class="tlaUNC">           0 :         readPos_ = 0;</span></span>
<span id="L147"><span class="lineNum">     147</span>                 :<span class="tlaUNC">           0 :         writePos_ = readPos_ + readable;</span></span>
<span id="L148"><span class="lineNum">     148</span>         [<span class="tlaUNC" title="Branch 0 was not executed"> # </span><span class="tlaUNC" title="Branch 1 was not executed"> # </span>]:<span class="tlaUNC">           0 :         assert(readable == ReadableBytes());  //下标移动的正确性</span></span>
<span id="L149"><span class="lineNum">     149</span>                 :             :     }</span>
<span id="L150"><span class="lineNum">     150</span>                 :<span class="tlaUNC">           0 : }</span></span>
        </pre>
              </td>
            </tr>
          </table>
          <br>

          <table width="100%" border=0 cellspacing=0 cellpadding=0>
            <tr><td class="ruler"><img src="../glass.png" width=3 height=3 alt=""></td></tr>
            <tr><td class="versionInfo">Generated by: <a href="https://github.com//linux-test-project/lcov" target="_parent">LCOV version 2.0-136.g49608c4</a></td></tr>
          </table>
          <br>

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</html>
